fp_to_sp_delta_(fp_to_sp_delta),
output_count_(0),
output_(NULL),
- integer32_values_(NULL),
- double_values_(NULL) {
+ deferred_heap_numbers_(0) {
if (FLAG_trace_deopt && type != OSR) {
PrintF("**** DEOPT: ");
function->PrintName();
Deoptimizer::~Deoptimizer() {
ASSERT(input_ == NULL && output_ == NULL);
- delete[] integer32_values_;
- delete[] double_values_;
}
int count = iterator.Next();
ASSERT(output_ == NULL);
output_ = new FrameDescription*[count];
- // Per-frame lists of untagged and unboxed int32 and double values.
- integer32_values_ = new List<ValueDescriptionInteger32>[count];
- double_values_ = new List<ValueDescriptionDouble>[count];
for (int i = 0; i < count; ++i) {
output_[i] = NULL;
- integer32_values_[i].Initialize(0);
- double_values_[i].Initialize(0);
}
output_count_ = count;
}
-void Deoptimizer::InsertHeapNumberValues(int index, JavaScriptFrame* frame) {
- // We need to adjust the stack index by one for the top-most frame.
- int extra_slot_count = (index == output_count() - 1) ? 1 : 0;
- List<ValueDescriptionInteger32>* ints = &integer32_values_[index];
- for (int i = 0; i < ints->length(); i++) {
- ValueDescriptionInteger32 value = ints->at(i);
- double val = static_cast<double>(value.int32_value());
- InsertHeapNumberValue(frame, value.stack_index(), val, extra_slot_count);
- }
+void Deoptimizer::MaterializeHeapNumbers() {
+ for (int i = 0; i < deferred_heap_numbers_.length(); i++) {
+ HeapNumberMaterializationDescriptor d = deferred_heap_numbers_[i];
+ Handle<Object> num = isolate_->factory()->NewNumber(d.value());
+ if (FLAG_trace_deopt) {
+ PrintF("Materializing a new heap number %p [%e] in slot %p\n",
+ reinterpret_cast<void*>(*num),
+ d.value(),
+ d.slot_address());
+ }
- // Iterate over double values and convert them to a heap number.
- List<ValueDescriptionDouble>* doubles = &double_values_[index];
- for (int i = 0; i < doubles->length(); ++i) {
- ValueDescriptionDouble value = doubles->at(i);
- InsertHeapNumberValue(frame, value.stack_index(), value.double_value(),
- extra_slot_count);
+ Memory::Object_at(d.slot_address()) = *num;
}
}
-void Deoptimizer::InsertHeapNumberValue(JavaScriptFrame* frame,
- int stack_index,
- double val,
- int extra_slot_count) {
- // Add one to the TOS index to take the 'state' pushed before jumping
- // to the stub that calls Runtime::NotifyDeoptimized into account.
- int tos_index = stack_index + extra_slot_count;
- int index = (frame->ComputeExpressionsCount() - 1) - tos_index;
- if (FLAG_trace_deopt) PrintF("Allocating a new heap number: %e\n", val);
- Handle<Object> num = isolate_->factory()->NewNumber(val);
- frame->SetExpression(index, *num);
-}
-
-
void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
int frame_index,
unsigned output_offset) {
int input_reg = iterator->Next();
intptr_t value = input_->GetRegister(input_reg);
bool is_smi = Smi::IsValid(value);
- unsigned output_index = output_offset / kPointerSize;
if (FLAG_trace_deopt) {
PrintF(
" 0x%08" V8PRIxPTR ": [top + %d] <- %" V8PRIdPTR " ; %s (%s)\n",
} else {
// We save the untagged value on the side and store a GC-safe
// temporary placeholder in the frame.
- AddInteger32Value(frame_index,
- output_index,
- static_cast<int32_t>(value));
+ AddDoubleValue(output_[frame_index]->GetTop() + output_offset,
+ static_cast<double>(static_cast<int32_t>(value)));
output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
}
return;
case Translation::DOUBLE_REGISTER: {
int input_reg = iterator->Next();
double value = input_->GetDoubleRegister(input_reg);
- unsigned output_index = output_offset / kPointerSize;
if (FLAG_trace_deopt) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- %e ; %s\n",
output_[frame_index]->GetTop() + output_offset,
}
// We save the untagged value on the side and store a GC-safe
// temporary placeholder in the frame.
- AddDoubleValue(frame_index, output_index, value);
+ AddDoubleValue(output_[frame_index]->GetTop() + output_offset, value);
output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
return;
}
input_->GetOffsetFromSlotIndex(this, input_slot_index);
intptr_t value = input_->GetFrameSlot(input_offset);
bool is_smi = Smi::IsValid(value);
- unsigned output_index = output_offset / kPointerSize;
if (FLAG_trace_deopt) {
PrintF(" 0x%08" V8PRIxPTR ": ",
output_[frame_index]->GetTop() + output_offset);
} else {
// We save the untagged value on the side and store a GC-safe
// temporary placeholder in the frame.
- AddInteger32Value(frame_index,
- output_index,
- static_cast<int32_t>(value));
+ AddDoubleValue(output_[frame_index]->GetTop() + output_offset,
+ static_cast<double>(static_cast<int32_t>(value)));
output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
}
return;
unsigned input_offset =
input_->GetOffsetFromSlotIndex(this, input_slot_index);
double value = input_->GetDoubleFrameSlot(input_offset);
- unsigned output_index = output_offset / kPointerSize;
if (FLAG_trace_deopt) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- %e ; [esp + %d]\n",
output_[frame_index]->GetTop() + output_offset,
}
// We save the untagged value on the side and store a GC-safe
// temporary placeholder in the frame.
- AddDoubleValue(frame_index, output_index, value);
+ AddDoubleValue(output_[frame_index]->GetTop() + output_offset, value);
output_[frame_index]->SetFrameSlot(output_offset, kPlaceholder);
return;
}
}
-void Deoptimizer::AddInteger32Value(int frame_index,
- int slot_index,
- int32_t value) {
- ValueDescriptionInteger32 value_desc(slot_index, value);
- integer32_values_[frame_index].Add(value_desc);
-}
-
-
-void Deoptimizer::AddDoubleValue(int frame_index,
- int slot_index,
+void Deoptimizer::AddDoubleValue(intptr_t slot_address,
double value) {
- ValueDescriptionDouble value_desc(slot_index, value);
- double_values_[frame_index].Add(value_desc);
+ HeapNumberMaterializationDescriptor value_desc(
+ reinterpret_cast<Address>(slot_address), value);
+ deferred_heap_numbers_.Add(value_desc);
}
class DeoptimizingCodeListNode;
-class ValueDescription BASE_EMBEDDED {
+class HeapNumberMaterializationDescriptor BASE_EMBEDDED {
public:
- explicit ValueDescription(int index) : stack_index_(index) { }
- int stack_index() const { return stack_index_; }
-
- private:
- // Offset relative to the top of the stack.
- int stack_index_;
-};
-
-
-class ValueDescriptionInteger32: public ValueDescription {
- public:
- ValueDescriptionInteger32(int index, int32_t value)
- : ValueDescription(index), int32_value_(value) { }
- int32_t int32_value() const { return int32_value_; }
-
- private:
- // Raw value.
- int32_t int32_value_;
-};
+ HeapNumberMaterializationDescriptor(Address slot_address, double val)
+ : slot_address_(slot_address), val_(val) { }
-
-class ValueDescriptionDouble: public ValueDescription {
- public:
- ValueDescriptionDouble(int index, double value)
- : ValueDescription(index), double_value_(value) { }
- double double_value() const { return double_value_; }
+ Address slot_address() const { return slot_address_; }
+ double value() const { return val_; }
private:
- // Raw value.
- double double_value_;
+ Address slot_address_;
+ double val_;
};
~Deoptimizer();
- void InsertHeapNumberValues(int index, JavaScriptFrame* frame);
+ void MaterializeHeapNumbers();
static void ComputeOutputFrames(Deoptimizer* deoptimizer);
Object* ComputeLiteral(int index) const;
- void InsertHeapNumberValue(JavaScriptFrame* frame,
- int stack_index,
- double val,
- int extra_slot_count);
-
- void AddInteger32Value(int frame_index, int slot_index, int32_t value);
- void AddDoubleValue(int frame_index, int slot_index, double value);
+ void AddDoubleValue(intptr_t slot_address, double value);
static LargeObjectChunk* CreateCode(BailoutType type);
static void GenerateDeoptimizationEntries(
// Array of output frame descriptions.
FrameDescription** output_;
- List<ValueDescriptionInteger32>* integer32_values_;
- List<ValueDescriptionDouble>* double_values_;
+ List<HeapNumberMaterializationDescriptor> deferred_heap_numbers_;
static int table_entry_size_;
}
+Address JavaScriptFrame::GetParameterSlot(int index) const {
+ int param_count = ComputeParametersCount();
+ ASSERT(-1 <= index && index < param_count);
+ int parameter_offset = (param_count - index - 1) * kPointerSize;
+ return caller_sp() + parameter_offset;
+}
+
+
+Object* JavaScriptFrame::GetParameter(int index) const {
+ return Memory::Object_at(GetParameterSlot(index));
+}
+
+
inline Object* JavaScriptFrame::receiver() const {
- const int offset = JavaScriptFrameConstants::kReceiverOffset;
- return Memory::Object_at(caller_sp() + offset);
+ return GetParameter(-1);
}
inline void JavaScriptFrame::set_receiver(Object* value) {
- const int offset = JavaScriptFrameConstants::kReceiverOffset;
- Memory::Object_at(caller_sp() + offset) = value;
+ Memory::Object_at(GetParameterSlot(-1)) = value;
}
isolate(), pc(), &safepoint_entry, &stack_slots);
unsigned slot_space = stack_slots * kPointerSize;
- // Visit the outgoing parameters. This is usually dealt with by the
- // callee, but while GC'ing we artificially lower the number of
- // arguments to zero and let the caller deal with it.
+ // Visit the outgoing parameters.
Object** parameters_base = &Memory::Object_at(sp());
Object** parameters_limit = &Memory::Object_at(
fp() + JavaScriptFrameConstants::kFunctionOffset - slot_space);
// Visit the return address in the callee and incoming arguments.
IteratePc(v, pc_address(), code);
- IterateArguments(v);
-}
-
-
-Object* JavaScriptFrame::GetParameter(int index) const {
- ASSERT(index >= 0 && index < ComputeParametersCount());
- const int offset = JavaScriptFrameConstants::kParam0Offset;
- return Memory::Object_at(caller_sp() + offset - (index * kPointerSize));
-}
-
-
-int JavaScriptFrame::ComputeParametersCount() const {
- Address base = caller_sp() + JavaScriptFrameConstants::kReceiverOffset;
- Address limit = fp() + JavaScriptFrameConstants::kLastParameterOffset;
- return static_cast<int>((base - limit) / kPointerSize);
}
}
+int JavaScriptFrame::GetNumberOfIncomingArguments() const {
+ ASSERT(!SafeStackFrameIterator::is_active(isolate()) &&
+ isolate()->heap()->gc_state() == Heap::NOT_IN_GC);
+
+ JSFunction* function = JSFunction::cast(this->function());
+ return function->shared()->formal_parameter_count();
+}
+
+
Address JavaScriptFrame::GetCallerStackPointer() const {
- int arguments;
- if (SafeStackFrameIterator::is_active(isolate()) ||
- isolate()->heap()->gc_state() != Heap::NOT_IN_GC) {
- // If the we are currently iterating the safe stack the
- // arguments for frames are traversed as if they were
- // expression stack elements of the calling frame. The reason for
- // this rather strange decision is that we cannot access the
- // function during mark-compact GCs when objects may have been marked.
- // In fact accessing heap objects (like function->shared() below)
- // at all during GC is problematic.
- arguments = 0;
- } else {
- // Compute the number of arguments by getting the number of formal
- // parameters of the function. We must remember to take the
- // receiver into account (+1).
- JSFunction* function = JSFunction::cast(this->function());
- arguments = function->shared()->formal_parameter_count() + 1;
- }
- const int offset = StandardFrameConstants::kCallerSPOffset;
- return fp() + offset + (arguments * kPointerSize);
+ return fp() + StandardFrameConstants::kCallerSPOffset;
}
Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
- const int arguments = Smi::cast(GetExpression(0))->value();
- const int offset = StandardFrameConstants::kCallerSPOffset;
- return fp() + offset + (arguments + 1) * kPointerSize;
+ return fp() + StandardFrameConstants::kCallerSPOffset;
}
void JavaScriptFrame::Iterate(ObjectVisitor* v) const {
IterateExpressions(v);
IteratePc(v, pc_address(), LookupCode());
- IterateArguments(v);
-}
-
-
-void JavaScriptFrame::IterateArguments(ObjectVisitor* v) const {
- // Traverse callee-saved registers, receiver, and parameters.
- const int kBaseOffset = JavaScriptFrameConstants::kLastParameterOffset;
- const int kLimitOffset = JavaScriptFrameConstants::kReceiverOffset;
- Object** base = &Memory::Object_at(fp() + kBaseOffset);
- Object** limit = &Memory::Object_at(caller_sp() + kLimitOffset) + 1;
- v->VisitPointers(base, limit);
}
inline void set_receiver(Object* value);
// Access the parameters.
- Object* GetParameter(int index) const;
- int ComputeParametersCount() const;
+ inline Address GetParameterSlot(int index) const;
+ inline Object* GetParameter(int index) const;
+ inline int ComputeParametersCount() const {
+ return GetNumberOfIncomingArguments();
+ }
// Check if this frame is a constructor frame invoked through 'new'.
bool IsConstructor() const;
virtual Address GetCallerStackPointer() const;
+ virtual int GetNumberOfIncomingArguments() const;
+
// Garbage collection support. Iterates over incoming arguments,
// receiver, and any callee-saved registers.
void IterateArguments(ObjectVisitor* v) const;
explicit ArgumentsAdaptorFrame(StackFrameIterator* iterator)
: JavaScriptFrame(iterator) { }
+ virtual int GetNumberOfIncomingArguments() const {
+ return Smi::cast(GetExpression(0))->value();
+ }
+
virtual Address GetCallerStackPointer() const;
private:
ASSERT(isolate->heap()->IsAllocationAllowed());
int frames = deoptimizer->output_count();
+ deoptimizer->MaterializeHeapNumbers();
+ delete deoptimizer;
+
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = NULL;
- for (int i = 0; i < frames; i++) {
- if (i != 0) it.Advance();
- frame = it.frame();
- deoptimizer->InsertHeapNumberValues(frames - i - 1, frame);
- }
- delete deoptimizer;
+ for (int i = 0; i < frames - 1; i++) it.Advance();
+ frame = it.frame();
RUNTIME_ASSERT(frame->function()->IsJSFunction());
Handle<JSFunction> function(JSFunction::cast(frame->function()), isolate);
projects / platform / upstream / v8.git / commitdiff